libxlDomainAttachNetDevice: release actual deivce and remove hostdev when fail
libxlDomainAttachNetDevice: release actual deivce and remove hostdev when fail

When AttachNetDevice failed, should call networkReleaseActualDevice
to release actual device, and if actual device is hostdev, should
remove the hostdev from vm->def->hostdevs.

Signed-off-by: Chunyan Liu <699809cfcad49bea8cea68d656dfc4a832feaf7a@suse.com>

jardasgit/libvirt,jardasgit/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,andreabolognani/libvirt,zippy2/libvirt,jfehlig/libvirt,crobinso/libvirt,taget/libvirt,taget/libvirt,zippy2/libvirt,olafhering/libvirt,libvirt/libvirt,taget/libvirt,fabianfreyer/libvirt,datto/libvirt,datto/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,eskultety/libvirt,nertpinx/libvirt,nertpinx/libvirt,taget/libvirt,jfehlig/libvirt,zippy2/libvirt,libvirt/libvirt,libvirt/libvirt,andreabolognani/libvirt,olafhering/libvirt,crobinso/libvirt,crobinso/libvirt,VenkatDatta/libvirt,libvirt/libvirt,crobinso/libvirt,nertpinx/libvirt,datto/libvirt,andreabolognani/libvirt,eskultety/libvirt,jfehlig/libvirt,jardasgit/libvirt,andreabolognani/libvirt,eskultety/libvirt,andreabolognani/libvirt,eskultety/libvirt,fabianfreyer/libvirt,zippy2/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,taget/libvirt,olafhering/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,datto/libvirt,eskultety/libvirt,VenkatDatta/libvirt,olafhering/libvirt,datto/libvirt,VenkatDatta/libvirt